3c6295a06d
same way as OpenBSD. The use of coherent (uncacheable on ARM and other arches) mappings for transfer buffers impacts performance, espcially where memcpys are involved. Audit the necessary usb_syncmem operations - a few were missing.
62 lines
2.4 KiB
C
62 lines
2.4 KiB
C
/* $NetBSD: usb_mem.h,v 1.32 2020/04/05 20:59:38 skrll Exp $ */
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/* $FreeBSD: src/sys/dev/usb/usb_mem.h,v 1.9 1999/11/17 22:33:47 n_hibma Exp $ */
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/*
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Lennart Augustsson (lennart@augustsson.net) at
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* Carlstedt Research & Technology.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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typedef struct usb_dma_block {
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bus_dma_tag_t tag;
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bus_dmamap_t map;
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void *kaddr;
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bus_dma_segment_t *segs;
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int nsegs;
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int nsegs_alloc;
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size_t size;
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size_t align;
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int flags;
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#define USB_DMA_FULLBLOCK __BIT(0)
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#define USB_DMA_COHERENT __BIT(1)
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LIST_ENTRY(usb_dma_block) next;
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} usb_dma_block_t;
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#define USBMALLOC_MULTISEG __BIT(0)
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#define USBMALLOC_COHERENT __BIT(1)
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usbd_status usb_allocmem(struct usbd_bus *, size_t, size_t, u_int, usb_dma_t *);
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void usb_freemem(struct usbd_bus *, usb_dma_t *);
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void usb_syncmem(usb_dma_t *, bus_addr_t, bus_size_t, int);
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bus_addr_t usb_dmaaddr(usb_dma_t *, unsigned int);
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#define DMAADDR(dma, o) usb_dmaaddr((dma), (o))
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#define KERNADDR(dma, o) \
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((void *)((char *)(dma)->udma_block->kaddr + (dma)->udma_offs + (o)))
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